09.12.2012 Views

RM0090: Reference manual - STMicroelectronics

RM0090: Reference manual - STMicroelectronics

RM0090: Reference manual - STMicroelectronics

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

<strong>RM0090</strong> Ethernet (ETH): media access control (MAC) with DMA controller<br />

Ethernet DMA current host transmit descriptor register (ETH_DMACHTDR)<br />

Address offset: 0x1048<br />

Reset value: 0x0000 0000<br />

The Current host transmit descriptor register points to the start address of the current<br />

transmit descriptor read by the DMA.<br />

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0<br />

HTDAP<br />

r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r<br />

Bits 31:0 HTDAP: Host transmit descriptor address pointer<br />

Cleared on reset. Pointer updated by DMA during operation.<br />

Ethernet DMA current host receive descriptor register (ETH_DMACHRDR)<br />

Address offset: 0x104C<br />

Reset value: 0x0000 0000<br />

The Current host receive descriptor register points to the start address of the current receive<br />

descriptor read by the DMA.<br />

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0<br />

HRDAP<br />

r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r<br />

Bits 31:0 HRDAP: Host receive descriptor address pointer<br />

Cleared on Reset. Pointer updated by DMA during operation.<br />

Ethernet DMA current host transmit buffer address register<br />

(ETH_DMACHTBAR)<br />

Address offset: 0x1050<br />

Reset value: 0x0000 0000<br />

The Current host transmit buffer address register points to the current transmit buffer<br />

address being read by the DMA.<br />

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0<br />

HTBAP<br />

r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r<br />

Bits 31:0 HTBAP: Host transmit buffer address pointer<br />

Cleared on reset. Pointer updated by DMA during operation.<br />

Doc ID 018909 Rev 3 1012/1416

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!